1165426560 has 384 divisors, whose sum is σ = 4429900800. Its totient is φ = 281014272.

The previous prime is 1165426553. The next prime is 1165426573. The reversal of 1165426560 is 656245611.

1165426560 is a `hidden beast` number, since 11 + 65 + 4 + 26 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2516889 + ... + 2517351.

It is an arithmetic number, because the mean of its divisors is an integer number (11536200).

Almost surely, 2^1165426560 is an apocalyptic number.

1165426560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165426560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214950400).

1165426560 is an abundant number, since it is smaller than the sum of its proper divisors (3264474240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165426560 is a wasteful number, since it uses less digits than its factorization.

1165426560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1165426560 is about 34138.3444238293. The cubic root of 1165426560 is about 1052.3534692937.

The spelling of 1165426560 in words is "one billion, one hundred sixty-five million, four hundred twenty-six thousand, five hundred sixty".